Chlogr (Changelog Generator) is a fast, efficient, native CLI tool that automatically generates changelogs from GitHub tags, pull requests, and issues. Written in Zig with zero external dependencies, it produces clean Markdown changelogs categorized by type.

## Features

• Fast compiled binary with zero external dependencies (pure Zig stdlib)
• Generates Markdown changelogs from GitHub data automatically
• Categorizes entries by labels: Features, Bug Fixes, and Other
• Links to pull requests, issues, and contributors
• Smart token resolution with automatic fallback chain
• Tag-based filtering (--since-tag and --until-tag)
• Label exclusion support (--exclude-labels)
• Customizable output filename and path
• Works with any public or private GitHub repository
• Integration tests verify core logic

## Command-Line Options

• --repo (required): GitHub repository in format [org]/[repo]. Example: github/cli
• --token (optional): GitHub API token. Falls back to env vars or gh CLI
• --output (optional): Output file path. Default: CHANGELOG.md
• --since-tag (optional): Start from this tag/version
• --until-tag (optional): End at this tag/version
• --exclude-labels (optional): Comma-separated labels to exclude
• --help or -h: Show help message

## Authentication

The tool automatically retrieves a GitHub token in this order: 1) --token flag, 2) GITHUB_TOKEN env var, 3) GH_TOKEN env var, 4) gh auth token command. Required for private repos and recommended for higher rate limits.

## Usage Examples

Basic: chlogr --repo owner/repository With output: chlogr --repo owner/repository --output HISTORY.md With token: chlogr --repo owner/repository --token ghp_xxxxxxxxxxxx Tag range: chlogr --repo owner/repository --since-tag v1.0.0 --until-tag v2.0.0 Exclude labels: chlogr --repo owner/repository --exclude-labels duplicate,wontfix

## Technical Details

• Built with Zig 0.15+ for native performance
• Zero external dependencies - Zig stdlib only
• Single portable executable
• Cross-platform (Linux, macOS, Windows)
• Modular architecture: CLI parsing, token resolution, GitHub API, changelog generation, markdown formatting

## Output Format

Generated changelogs include release/version headers with links, release dates, categorized entries (Features, Bug Fixes, Other), PR/issue numbers with links, contributor usernames with profile links, and clean Markdown formatting.

## Installation

Via snap: sudo snap install chlogr From source: git clone https://github.com/christianhelle/chlogr && cd chlogr && zig build

## Requirements

• GitHub account (for private repos or higher rate limits)
• GitHub API token (optional but recommended)
• Zig 0.15+ for building from source

## Links

Source: https://github.com/christianhelle/chlogr Issues: https://github.com/christianhelle/chlogr/issues